Hi, vpp experts,
I am trying to allocate more cores to a phy nic. I want to allocate cores
4,6,8,10 to eth0, and cores 12,14,16,18 to eth1.
cpu {
main-core 2
* # corelist-workers 4,6,8,10,12,14,16,18,20,22 <== This does not work.
vpp crashes when starting. *
corelist-workers 4,6,8,10,12,14,16,18
}
dpdk {
socket-mem 2048,0
log-level debug
no-tx-checksum-offload
dev default{
num-tx-desc 512
num-rx-desc 512
}
dev 0000:1a:00.0 {
# workers 4,6,8,10,12
workers 4,6,8,10
name eth0
}
dev 0000:19:00.1 {
# workers 14,16,18,20,22
workers 12,14,16,18
name eth1
}
# Use aesni mb lib.
vdev crypto_aesni_mb0,socket_id=0
# Use qat VF pcie addresses.
# dev 0000:3d:01.0
no-multi-seg
}
Afte vpp starts, I can see eth1 got 4 cores but eth0 only got 3 cores.
vpp# sh thread
ID Name Type LWP Sched Policy (Priority)
lcore Core Socket State
0 vpp_main 10653 other (0) 2
0 0
1 vpp_wk_0 workers 10655 other (0) 4
1 0
2 vpp_wk_1 workers 10656 other (0) 6
4 0
3 vpp_wk_2 workers 10657 other (0) 8
2 0
4 vpp_wk_3 workers 10658 other (0) 10
3 0
5 vpp_wk_4 workers 10659 other (0) 12
8 0
6 vpp_wk_5 workers 10660 other (0) 14
13 0
7 vpp_wk_6 workers 10661 other (0) 16
9 0
*8 vpp_wk_7 workers 10662 other (0) 18
12 0 <=== core 18 is not used by eth0.*
vpp# sh interface rx-placement
Thread 1 (vpp_wk_0):
node dpdk-input:
eth1 queue 0 (polling)
Thread 2 (vpp_wk_1):
node dpdk-input:
eth1 queue 1 (polling)
Thread 3 (vpp_wk_2):
node dpdk-input:
eth1 queue 2 (polling)
Thread 4 (vpp_wk_3):
node dpdk-input:
eth1 queue 3 (polling)
*Thread 5 (vpp_wk_4): node dpdk-input: eth0 queue 0 (polling) eth0
queue 2 (polling)*
Thread 6 (vpp_wk_5):
node dpdk-input:
eth0 queue 3 (polling)
Thread 7 (vpp_wk_6):
node dpdk-input:
eth0 queue 1 (polling)
vpp#
It seems there is a limitation on assigning cores to nic.
1. I cannot allocate cores after 20 to corelist-workers.
2. Cores after 18 cannot be allocated to nic.
Is this some bug? Or, some undocumented limitation?
Thanks.
Chuan
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